Pass proposals by reference, not value.
Pass proposals by reference, not value.

The fix for #281 in 25342e8 was ineffective because it operated
on a copy of the proposal that was immediately discarded; this
should actually fix the problem.

GokulSrinivas/cockroach,domluna/cockroach,yosiat/cockroach,ngaut/cockroach,bg451/cockroach,XuWanHong/cockroach-1,bg451/cockroach,yosiat/cockroach,vaibhavarora/cockroach,vivekmenezes/cockroach,marcuswestin/cockroach,abhishekgahlot/cockroach,Kevin-GuanJian/cockroach,cuongdo/cockroach,mbonaci/cockroach,veteranlu/cockroach,jess-edwards/cockroach,XuWanHong/cockroach-1,marcuswestin/cockroach,SustainFund/cockroach,mbonaci/cockroach,yananzhi/cockroach,iqstack/cockroach,chrisseto/cockroach,SustainFund/cockroach,freakynit/cockroach,marcuswestin/cockroach,XuWanHong/cockroach-1,marcuswestin/cockroach,glycerine/cockroach,fengshao0907/cockroach,nkhuyu/cockroach,yananzhi/cockroach,domluna/cockroach,veteranlu/cockroach,jgautheron/cockroach,veteranlu/cockroach,Kevin-GuanJian/cockroach,GokulSrinivas/cockroach,chrisseto/cockroach,hassyma/cockroach,Kevin-GuanJian/cockroach,jgautheron/cockroach,slavau/cockroach,domluna/cockroach,SustainFund/cockroach,petermattis/cockroach,abhishekgahlot/cockroach,XuWanHong/cockroach-1,abhishekgahlot/cockroach,mbertschler/cockroach,veteranlu/cockroach,chrisseto/cockroach,domluna/cockroach,bg451/cockroach,vivekmenezes/cockroach,vaibhavarora/cockroach,jamesgraves/cockroach,cockroachdb/cockroach,Abioy/cockroach,sunya123/cockroach,maxlang/cockroach,glycerine/cockroach,jgautheron/cockroach,Kevin-GuanJian/cockroach,maxlang/cockroach,jamesgraves/cockroach,jess-edwards/cockroach,vaibhavarora/cockroach,cuongdo/cockroach,petermattis/cockroach,nieyy/cockroach,hassyma/cockroach,yiixiansheng/cockroach,jamesgraves/cockroach,briceburg/cockroach,fengshao0907/cockroach,vaibhavarora/cockroach,yananzhi/cockroach,arypurnomoz/cockroach,alex/cockroach,il9ue/cockroach,marcuswestin/cockroach,jgautheron/cockroach,nieyy/cockroach,bg451/cockroach,SustainFund/cockroach,nieyy/cockroach,hassyma/cockroach,slavau/cockroach,jmank88/cockroach,alunarbeach/cockroach,linearb/cockroach,domluna/cockroach,glycerine/cockroach,abhishekgahlot/cockroach,domluna/cockroach,cuongdo/cockroach,yananzhi/cockroach,jamesgraves/cockroach,yiixiansheng/cockroach,cuongdo/cockroach,slavau/cockroach,jamesgraves/cockroach,freakynit/cockroach,es-chow/cockroach,loucash/cockroach,glycerine/cockroach,fengshao0907/cockroach,il9ue/cockroach,c4pt0r/cockroach,il9ue/cockroach,petermattis/cockroach,loucash/cockroach,cockroachdb/cockroach,SustainFund/cockroach,nkhuyu/cockroach,nieyy/cockroach,loucash/cockroach,briceburg/cockroach,veteranlu/cockroach,XisiHuang/cockroach,yiixiansheng/cockroach,paperstreet/cockroach,cuongdo/cockroach,ajayaa/cockroach,paperstreet/cockroach,bg451/cockroach,cockroachdb/cockroach,chrisseto/cockroach,alex/cockroach,vivekmenezes/cockroach,c4pt0r/cockroach,ajayaa/cockroach,alunarbeach/cockroach,linearb/cockroach,sunya123/cockroach,cockroachdb/cockroach,alex/cockroach,linearb/cockroach,marcuswestin/cockroach,maxlang/cockroach,mbertschler/cockroach,glycerine/cockroach,bg451/cockroach,mbonaci/cockroach,c4pt0r/cockroach,sunya123/cockroach,jmank88/cockroach,ngaut/cockroach,GokulSrinivas/cockroach,il9ue/cockroach,yananzhi/cockroach,Kevin-GuanJian/cockroach,maxlang/cockroach,iqstack/cockroach,vaibhavarora/cockroach,alex/cockroach,nkhuyu/cockroach,ngaut/cockroach,mbertschler/cockroach,yosiat/cockroach,arypurnomoz/cockroach,chrisseto/cockroach,alunarbeach/cockroach,linearb/cockroach,slavau/cockroach,cockroachdb/cockroach,c4pt0r/cockroach,jess-edwards/cockroach,glycerine/cockroach,es-chow/cockroach,paperstreet/cockroach,hassyma/cockroach,maxlang/cockroach,cuongdo/cockroach,ngaut/cockroach,yosiat/cockroach,yiixiansheng/cockroach,jess-edwards/cockroach,arjun4084346/cockroach,arjun4084346/cockroach,ajayaa/cockroach,Abioy/cockroach,jgautheron/cockroach,mbertschler/cockroach,arypurnomoz/cockroach,nieyy/cockroach,fengshao0907/cockroach,briceburg/cockroach,c4pt0r/cockroach,il9ue/cockroach,freakynit/cockroach,il9ue/cockroach,jmank88/cockroach,sunya123/cockroach,mbonaci/cockroach,sunya123/cockroach,Abioy/cockroach,jess-edwards/cockroach,alunarbeach/cockroach,vivekmenezes/cockroach,arjun4084346/cockroach,ajayaa/cockroach,maxlang/cockroach,ajayaa/cockroach,alunarbeach/cockroach,briceburg/cockroach,vaibhavarora/cockroach,nkhuyu/cockroach,freakynit/cockroach,nieyy/cockroach,iqstack/cockroach,cockroachdb/cockroach,paperstreet/cockroach,sunya123/cockroach,Kevin-GuanJian/cockroach,XuWanHong/cockroach-1,XisiHuang/cockroach,abhishekgahlot/cockroach,briceburg/cockroach,petermattis/cockroach,vivekmenezes/cockroach,jess-edwards/cockroach,XisiHuang/cockroach,sunya123/cockroach,petermattis/cockroach,nieyy/cockroach,jmank88/cockroach,freakynit/cockroach,jmank88/cockroach,ngaut/cockroach,freakynit/cockroach,arjun4084346/cockroach,loucash/cockroach,loucash/cockroach,alex/cockroach,sunya123/cockroach,arypurnomoz/cockroach,cuongdo/cockroach,glycerine/cockroach,marcuswestin/cockroach,arjun4084346/cockroach,petermattis/cockroach,nkhuyu/cockroach,hassyma/cockroach,yosiat/cockroach,veteranlu/cockroach,nkhuyu/cockroach,fengshao0907/cockroach,arypurnomoz/cockroach,briceburg/cockroach,XisiHuang/cockroach,arjun4084346/cockroach,SustainFund/cockroach,chrisseto/cockroach,es-chow/cockroach,es-chow/cockroach,arjun4084346/cockroach,glycerine/cockroach,slavau/cockroach,bg451/cockroach,jmank88/cockroach,vaibhavarora/cockroach,jgautheron/cockroach,XuWanHong/cockroach-1,marcuswestin/cockroach,Abioy/cockroach,arypurnomoz/cockroach,paperstreet/cockroach,Abioy/cockroach,yiixiansheng/cockroach,hassyma/cockroach,paperstreet/cockroach,jmank88/cockroach,vaibhavarora/cockroach,paperstreet/cockroach,alex/cockroach,petermattis/cockroach,loucash/cockroach,mbonaci/cockroach,XisiHuang/cockroach,fengshao0907/cockroach,petermattis/cockroach,cockroachdb/cockroach,cuongdo/cockroach,Abioy/cockroach,jamesgraves/cockroach,yosiat/cockroach,es-chow/cockroach,paperstreet/cockroach,iqstack/cockroach,c4pt0r/cockroach,mbertschler/cockroach,ngaut/cockroach,mbonaci/cockroach,jess-edwards/cockroach,vivekmenezes/cockroach,jamesgraves/cockroach,GokulSrinivas/cockroach,GokulSrinivas/cockroach,mbertschler/cockroach,iqstack/cockroach,il9ue/cockroach,iqstack/cockroach,cockroachdb/cockroach,ngaut/cockroach,yananzhi/cockroach,yananzhi/cockroach,veteranlu/cockroach,linearb/cockroach,abhishekgahlot/cockroach,es-chow/cockroach,veteranlu/cockroach,il9ue/cockroach,linearb/cockroach,linearb/cockroach,domluna/cockroach,maxlang/cockroach,XisiHuang/cockroach,es-chow/cockroach,alunarbeach/cockroach,XuWanHong/cockroach-1,nieyy/cockroach,GokulSrinivas/cockroach,arjun4084346/cockroach,ajayaa/cockroach,vivekmenezes/cockroach,iqstack/cockroach,vivekmenezes/cockroach,yiixiansheng/cockroach,Kevin-GuanJian/cockroach,slavau/cockroach,mbertschler/cockroach,maxlang/cockroach